Tire for motor-vehicles.



No. 716,099. Pafentedjnc. le, 190'2.

. M. P uLAK.V A

-TIREn FOB MDTUR VEH|CLE$.

. (Application mea June 9, i902.)

-MAX PLACK, OF WALTERSHAUSN, GERMANY.

ATENT FFICE..

TIRE FOR MTOR-VEHICLES.

SPGIFIGATION forming part of Letters Patent No. 716,099, dated December1.6, 1902.

" Application inea June e, lena serial No. 110,942. (No model.)

" To @ZZ` whom t mag/concern.-

Be it known 'that I, MAX'POLACK, manufacturer, a subject o'the Duke ofvSaxe-Cooljthe tire as much as possible. such-tires become Iiattenedunder theweight which they support.

burg-Gotha,r esiding at Waltershausen,in the Duchy ofSaxe-.Coburg-Gotha, in the German Empire, have invented certain new anduse'- ful Improvements in Tires for 'Motor-Vehifclsp'f Vwhich thefollowing is a specification.

j The pneumatictires as used hitherto for motor-vehicles have thedrawback that owing to uthe weight' of the vehicle they becomeflattened, and thus-offer a'large surface in the contact-with the road,whereby-the friction of the tire-on the road is considerably increasedand the motion of the vehicle, partie ularly on adusty ormuddy road, isconsiderably lessened or requires extra driving power. Endeavors havebeen made to overcome this drawback b v giving the tire on its outerperiphery a somewhat-pointed shape, with the object of reducing theroad-contact surface However,

The surface in contact with the road fincreases actually with the in-c,

` crease of the weight, as the tire becomes ,fiattenedand broader inspite of the pointed'com' tact-surface. In order to overcome thisdrawfback, the tireor outer cover receives, accordthe'tire becoming flattenedor broadened.

In describing the invention in'detail referenc'e is had to theaccompanying drawings,

r ing parts throughout vthe several views, andifm-ming a part of thisspecification, wherein like reference-[characters denote correspondinwhich- Eigure 1 shows a sectional elevation of a construction ofa'pneumatic tire or outer cover when not under pressure embodying myimprovements, and Fig. 2 alikeview when compressed. Fig. 3 shows asectional elevation of a construction of a modified form of acushion-tire or outer covering when-not under pressure embodying myinvention, and Fig. 4 a like View when compressed..

The tire being wedge-shaped at its periphery is provided laterally withone or more 4slightly inwardly curved portions a, which `upon theiniating and loading of the tire,

andtherefore on lecrea'sing or compressing the annular hollow space, inthe irst place move outwardly, so that the sides of the tire becomealmost straight, unlike the tires in which the air presses equally onall sides. Consequently the tire maintains its shape also when4supporting a load, Fig. A2.

O wing to the fact that the running contactsurface of the tire isnotincreased the danger of side slip en wet'roads or asphalt isprevented. While Figs. l and 2 represent a-pneutour, the outer face ofsaid convexe-concave I portion adapted to straighten when the tire iscompressed.

2. A vehicle-tire having a wedge-shapedpe ripheral portion and its sidesslightly curved, the outer face of said curved portion of `the sidesadapted to straighten when the tire-is compressed.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses. l

Witnesses:

WOLDEMAR HAUPT,

HENRY HASPER.

matic tire or outer cover according-to the i MAX. PoL'AoK.

